Method of encoding image pixel values for storage as compressed

Details Method of encoding image pixel values for storage as compressed Method of encoding image pixel values for storage as compressed

1991-07-22

1993-12-14

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 713, H04N 7137

Patent

active

052708128

ABSTRACT:
A method of encoding an image for CD-I players comprises obtaining the pixel information as a first matrix (M1) of 768.times.560 pixel component values, decimation filtering (1) the first matrix (M1) to produce a second matrix (M2) of 384.times.560 pixel component values, encoding (2) the second matrix (M2) to produce a first set of DYUV digital data (RDD1) for storage on a compact disc (SM), applying the digital data (RDD1) to a decoder (3) to form a third matrix (M3) of 384.times.560 pixel component values, interpolation filtering (4) the third matrix (M3) to form a fourth matrix (M4) of 768.times.560 pixel component values, forming the difference (5) between the first (M1) and fourth (M4) matrices to produce a fifth matrix (M5) of 768.times.560 difference values and encoding the fifth matrix (M5) as respective multi-bit and/or run length codes (RDD1) for storage on a compact disc (SM). Compatibility with known hardware (the CD-I standard `basecase` player) is obtained by encoding negative difference values using the quantization levels in the guard range (0-15) below black level (16, on a scale of zero to 255).

REFERENCES:
patent: 4857992 (1989-08-01), Richards
patent: 4858026 (1989-08-01), Richards
patent: 4868764 (1989-09-01), Richards
patent: 5014127 (1991-05-01), Richards

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